GLS2 and infection: In this way, while salmonid alpha virus 3 (SAV3) strongly induced the expression of lia, lga and, to a lesser extent, lha, but not lda, lca or lfa, infection by P. salmonis resulted predominantly in positive regulation from lga. The induction of lca, which is predominantly expressed in primary and secondary lymphoid tissues, was marginal except for a transient upregulation in the pancreas following SAV3 challenge.